1. Introduction to the Microscope
Care
Parts
Focusing
Students will have their microscopes out, for reference as we go through each of the steps. As an introduction, students will be asked what kinds of things they can do with this tool.

2. Microscope Care Always carry with 2 hands
Only use lens paper for cleaning
Do not force knobs
Always store covered
Keep objects clear of desk and cords
Teacher demonstrates how to hold the microscope, where the lens paper is located and how to use it. Students will be invited to turn the knobs and observe the stage as it moves up and down. Teacher will demonstrate how to store the microscope.

3. Parts of a Compound Microscope

4. Microscope Parts Eyepiece Body Tube Revolving Nosepiece Arm
Objective Lens
Stage
Stage Clips
Coarse Focus
This is the exact version of the microscope used in class. Students will be identifying the parts on the microscopes at their desks as we go along and what their functions are.
Diaphragm
Fine Focus
Light
Base

5. Compound Microscope A microscope is a very powerful magnifying glass
A microscope helps you see things like cells up close

6. Eyepiece
View the specimen through the eyepiece

7. Stage Clips & Objectives
Stage clips hold the slide in place
Low power objective is used to focus the microscope (short & fat)
High power objective is used to view details of a specimen

8. Coarse Adjustment, Fine Adjustment, & Base
Coarse adjustment focuses adjustment
Fine adjustment fine tunes & gives detailed focus(usually smaller than coarse adjustment knob)
Base is where the microscope rests

9. Stage Stage is part where the slide rests
Mirror (or light source) directs light upwards onto the slide.

10. Diaphragm
Diaphragm allows light in

11. Nosepiece
Nosepiece is the rotating device that holds the objectives (lenses)

12. Arm
Arm is the part where you carry the microscope

13. Can you name the parts of a compound microscope?

14. Answers base mirror (light source) diaphragm stage stage clips
low power objective lens  
high power objective lens  
nosepiece  
arm 
fine focus knob  
body tube  
coarse focus knob  
eyepiece

15. Types of Microscopes

16. Light microscope
(for small objects - similar to the way binoculars magnify objects far away.)

17. The Compound Light Microscope

18. May have many lenses that magnify the object
Eyepiece = 10x magnification
Objective = 10x (low) or 40X (high)

19. Total magnification=
eyepiece X objective
ex: 10x X 40x = 400x total magnification

20. Compound Light Microscope
Powered by Light & Lenses
Powers of Magnification
Ocular Lens= _________
Low Power Objective= _______
Medium Power Objective= _______
High Power Objective= _______
Calculating Total Magnification= ____________
Resolution
Parts

21. Stereomicroscope
To look at large things that light cannot pass through (one eyepiece for each eye)

22. Stereomicroscopes

23. Stereomicroscopes
3 - D image
can only magnify 10x to 600x

24. Electron Microscope
can magnify more than 500,000x

26. House Fly

27. Using the Microscope Place the Slide on the Microscope Use Stage Clips
Click Nosepiece to the lowest (shortest) setting
Look into the Eyepiece
Use the Coarse Focus
Give students a slide from the “common things” set, each student will practice focusing and changing objectives.

28. Using High Power Follow steps to focus using low power
Click the nosepiece to the longest objective
Do NOT use the Coarse Focusing Knob
Use the Fine Focus Knob to bring the slide into focus
Have students exchange slides so they can look at different things, walk them through using the high power objective to focus slides. Emphasize not using the coarse objective during this process, as it will crack the slides.
What can you find on your slide?